<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>
  
</head>

<body>
    <div id="app"></div>
    <script type="text/babel">
        class App extends React.Component {
            state = {
                isHot: true
            }

            render() {
                const { isHot } = this.state
                return (
                    <div>
                        <button onClick={this.changeWeatherHandle}>改变状态</button>
                        {
                            isHot ?
                                <div>
                                    <h1>天气好热</h1>
                                    <p>热的雪糕都花了</p>
                                </div>
                                :
                                <div>
                                    <h1>天气太冷了</h1>
                                    <p>冷到心巴上了</p>
                                </div>
                        }
                    </div>
                )
            }
            changeWeatherHandle = () => {
                const { isHot } = this.state;
                this.setState({ isHot: !isHot })
            }
        }

        const root = ReactDOM.createRoot(document.getElementById("app"))
        root.render(<App/>)
    </script>
</body>

</html>